C Corp questions for investments in different industries

[Charles D Cruz]

If am the sole shareholder for a holding company  formed as a c Corp whats the best way to continue to invest additional funds from myself into it?

Background: I intend for it to hold real estate, shares for an s corp(multiple investors real estate), along with part/whole ownership of other none real estate service business.

I have no intention to with draw funds for 10 years as I indeed to feed the beast.